"Coming down buckets" is an expression that typically refers to heavy rainfall. In terms of antonyms, there are several words that describe the opposite of this weather phenomenon. For instance, the word "dry" could be used to convey the absence of rainfall. Other antonyms for "coming down buckets" could include "clear," "sunshine," or "fair." These words all suggest conditions that are sunny, warm, and dry - the opposite of a rainstorm. Additionally, phrases such as "calm weather" or "a break in the storm" could also be used to describe conditions that are the opposite of torrential rainfall.